Microstructural, chemical, and mechanical characterization of extruded Al-Cu-Li rods Articles uri icon

publication date

  • September 2023

start page

  • 1

end page

  • 14


  • 113048


  • 203

International Standard Serial Number (ISSN)

  • 1044-5803

Electronic International Standard Serial Number (EISSN)

  • 1873-4189


  • This work investigates the influence of the alloying elements in rods of the alloys Al-Cu-Li produced by novel powder metallurgy routes. In the first route, the powders were mixed and uniaxial cold-pressed, followed by hot extrusion to produce 5 mm diameter rods. The second route introduced an intermediate step of heat treatment that was carried out at 525 ÂșC for 1 h in a pure N2 atmosphere before the extrusion. This was done to evaluate the importance of homogenization of the alloying elements during the heat treatment, as well as the tendency to form new phases in the extruded rods. The obtained rods were characterized by SEM, EBSD, Vickers micro-hardness, chemical composition (ICP-OES), and tensile tests. The results obtained showed that the alloy 1 (AA2060) presents a more homogeneous microstructure than alloy 2 (AA2196), and it is observed the benefit of Mg addition, which improves the microstructure after HT. The EBSD analysis showed a typical preferential orientation of a duplex fiber texture. The ICP-OES analysis reports losses of Li and Mg for both alloys. Regarding to the measurement of hardness, the results were very different depending on the alloy and the HT prior to the extrusion process.


  • Chemistry
  • Industrial Engineering
  • Materials science and engineering
  • Physics


  • aluminium-lithium alloys; extrusion; powder metallurgy; microstructure; chemical properties; mechanical properties